Playstation, it's simple and iconic. Immediately communicate it's a system to have fun
Dreamcast, very good name, it's elegant almost mystical
Game Boy. Creative name for a portable console, and the lack of Nintendo's name made it pretty clean
Saturn. Sega was really good with their naming. Saturn looks special, I don't know why it just sounds good
Nintendo Switch, the only system with "Nintendo" in the name that I actually love because it just sounds cool and communicates perfectly what the console is about